Pure speculation but I bet the taco bolt on handle change had more to do with packaging and shipping savings than it did with function. For me, I just prefer the classic kettle look over the new handle. Plus, I don't have any problem using a towel or hot pad once in awhile.
Weber is a business and when they change things there's a reason. They would not change the handle to please the consumer. It is to protect them from getting sued by some moron who burned his hand and reduce claims on damaged and rusted handles.
I'm outrageous and cutting-edge innovative. I wear a glove. The taco handle is ugly, gross, a crime against humanity, and antithetical to the natural beauty of the Weber kettle grill.My guess is the main motivation was to reduce costs associated w/ shipping and warranty lid replacement due to handle weld rust.